package collection;

import java.util.ArrayList;
import java.util.Collection;

/**
 *
 */
public class CollectionDemo3 {
    public static void main(String[] args) {
        Collection c=new ArrayList();
        Point p=new Point(1,2);
        c.add(p);
        System.out.println(p);
        System.out.println(c);

        p.setX(100);
        System.out.print(p);
        System.out.print(c);
    }
}
